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United States Patent | 5,318,633 |
Yamamoto ,   et al. | June 7, 1994 |
A heat treating apparatus comprises a reaction tube for receiving a plurality of articles to be treated and a heating unit surrounding at least part of the reaction tube. The reaction tube comprises a first structural section, at least part of which is surrounded by the heating unit and a second structural section, at least part of which extends from the heating unit. The first structural section is made of material having thermal resistivity and thermal conductivity higher than the second structural section.
Inventors: | Yamamoto; Akihito (Tokyo, JP); Yasuhisa; Naohiko (Tokyo, JP); Mashimo; Noriyoshi (Tokyo, JP); Abe; Masaharu (Fuchu Tokyo, JP); Watanabe; Shingo (Fuchu Tokyo, JP) |
Assignee: | Tokyo Electron Sagami Limited (Kanagawa, JP); Kabushiki Kaisha Toshiba (Kawasaki, JP) |
Appl. No.: | 846948 |
Filed: | March 6, 1992 |
Mar 07, 1991[JP] | 3-104898 | |
Mar 07, 1991[JP] | 3-104899 |
Current U.S. Class: | 118/725; 118/50; 118/724; 118/728; 118/733 |
Intern'l Class: | C23C 016/00 |
Field of Search: | 118/724,725,728,733 |
4253417 | Mar., 1981 | Valentijn | 118/724. |
4745088 | May., 1988 | Inoue et al. | 118/730. |
4989540 | Feb., 1991 | Fuse | 118/719. |
5029554 | Jul., 1991 | Miyashita et al. | 118/724. |